Questions

DNA is not a single stranded and does not have amino acids. Hence options, b & C are eiminated. Dna is a double helix structure containing nucleobase—either cytosine (C), guanine (G), adenine (A), or thymine (T)—as well as a monosaccharide sugar called deoxyribose and a phosphate group. 

The exact time taken by the earth for single rotation on its own axis is 23 hrs 56 min 4.09 sec.

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These are called intrusive igneous rocks because the magma has intruded into pre-exiting rock layers. Types of intrusive igneous rocks are granite and basalt .

A batholith is the largest of the intrusive bodies.

Uranus is 2,870 million kilometers away from the sun and the time taken to complete one round at a speed of 6.8 km/sec is as  long as 84 years on earth

The main motive behind dealer incentives is to give the products at some low price for the dealers who take the products in bulk and maintain good selling of these products.